From: Li Zefan <lizf@cn.fujitsu.com>
To: Steven Rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@elte.hu>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
Wenji Huang <wenji.huang@oracle.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 1/7] ftrace: Fix MATCH_END_ONLY function filter
Date: Mon, 14 Dec 2009 11:57:29 +0800 [thread overview]
Message-ID: <4B25B7A9.3060108@cn.fujitsu.com> (raw)
In-Reply-To: <4B25B797.1040201@cn.fujitsu.com>
For '*foo' pattern, we should allow any string ending with
'foo', but ftrace filter incorrectly disallows strings
like bar_foo_foo:
# echo '*io' > set_ftrace_filter
# cat set_ftrace_filter | grep 'req_bio_endio'
# cat available_filter_functions | grep 'req_bio_endio'
req_bio_endio
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
---
kernel/trace/ftrace.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index e51a1bc..3216ed6 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -1690,7 +1690,7 @@ ftrace_regex_lseek(struct file *file, loff_t offset, int origin)
static int ftrace_match(char *str, char *regex, int len, int type)
{
int matched = 0;
- char *ptr;
+ int slen;
switch (type) {
case MATCH_FULL:
@@ -1706,8 +1706,8 @@ static int ftrace_match(char *str, char *regex, int len, int type)
matched = 1;
break;
case MATCH_END_ONLY:
- ptr = strstr(str, regex);
- if (ptr && (ptr[len] == 0))
+ slen = strlen(str);
+ if (slen >= len && memcmp(str + slen - len, regex, len) == 0)
matched = 1;
break;
}
--
1.6.3
next prev parent reply other threads:[~2009-12-14 3:57 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-14 3:57 [PATCH 0/7] tracing: Fix bugs in string filters Li Zefan
2009-12-14 3:57 ` Li Zefan [this message]
2009-12-14 3:57 ` [PATCH 2/7] tracing/filters: Fix MATCH_FRONT_ONLY filter matching Li Zefan
2009-12-14 3:57 ` [PATCH 3/7] tracing/filters: Fix MATCH_END_ONLY " Li Zefan
2009-12-14 3:58 ` [PATCH 4/7] lib: Introduce strnstr() Li Zefan
2009-12-14 3:58 ` [PATCH 5/7] tracing/filters: Fix MATCH_MIDDLE_ONLY filter matching Li Zefan
2009-12-14 3:58 ` [PATCH 6/7] tracing/filters: Fix MATCH_END_ONLY filter matching for PTR_STRING Li Zefan
2009-12-14 3:59 ` [PATCH 7/7] tracing/filters: Add comment for match callbacks Li Zefan
2009-12-14 12:39 ` [PATCH 0/7] tracing: Fix bugs in string filters Frederic Weisbecker
2009-12-21 1:28 ` Li Zefan
2010-01-14 2:52 [PATCH 0/7][RESEND] " Li Zefan
2010-01-14 2:53 ` [PATCH 1/7] ftrace: Fix MATCH_END_ONLY function filter Li Zefan
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